Irwin 10502850 Step Drill Bit 4-12mm (9 Holes)
Step Drill. Designed for precise drilling in thin materials.
They have a single flute for maximum drilling control into sheetmetal.
A unique flute design which ensures perfect round holes in sheetmetal.
A fluted shank which prevents the drill bit from slipping in thechuck and a self centering point that will not walk and eliminatescentre punching.
Made from industrial grade M7 high-speed steel.
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